Session: 12-12-01: Modeling of the Fracture, Failure, and Fatigue in Solids

Paper Number: 140034

140034 - Testing and Constitutive Modeling of Creep for Wireline Cables 

For ASME IMECE2024

 

Title: Testing and Constitutive Modeling of Creep for Wireline Cables

 

Authors: Haitao Zhang, Muhannad Abuhaikal, Sheng Chang, Viraj Singh, James Wen

 

Abstract:

 

Wireline cables are used as a conveyance for the acquisition of subsurface geophysical and petrophysical data and for delivery of various well construction services such as pipe recovery, perforating, plug setting, well cleaning, and fishing. Wireline cables usually have a multilayer structure including electrical conductors to send electric power or signals, insulation layers, and mechanical elements such as armor wires to carry mechanical load such as the weight of the downhole tools. For wireline jobs, position of the downhole tools is critical for quality of service. Obtaining correct estimation and control of the depth of downhole tools is important for success of a wireline job. Depth of downhole tools is directly governed by the length of the wireline cable. Traditional way for estimation of wireline depth is through measurement by a depth wheel or a depth encoder on the surface and considering tension stretch and thermal expansion of the cable. This method becomes inaccurate for complex downhole conditions where the job is subjected to extended depth, variation of tool configurations (weight), and long-time at elevated temperature where creep of the cable becomes important for length change of the cable. Other methods include direct downhole measurement of tool movement, using standard depth referencing points or stretch correction marks. These methods are often time consuming, depending on prerequisites and availability of other tools and measurements, and unsuitable for real-time operations. There is need for a simple model capable of predicting wireline cable stretch with creep in an efficiently way.

In this study, we develop a rate dependent thermo-elastic constitutive material model for cables to predict cable stretch at different temperature and loading rates. Rate dependent behavior of the cable is modeled with linear viscoelasticity using the Voigt-Wiechert model which includes a single linear spring and multiple Kelvin-Voigt elements in series. The constitutive model is represented by a Prony series. A typical wireline cable is selected as an example. Coefficients of the Prony series are calibrated with time-creep strain test data of the cable for different tension levels and temperatures. A creep characterization procedure is developed for testing wireline cables. A quadratic equation is used to capture time-temperature dependence considering the complex geometry and many components of the cable. The developed constitutive model is verified in ABAQUS by comparing the predicted creep behavior of the cable under different temperatures with test measurement data. The developed cable characterization testing procedure can be readily applied to other wireline cables. The developed cable constitutive model can be easily implemented in computer programs and allows for real-time estimation and control of cable depth under complex wireline job conditions.

Presenting Author: Haitao Zhang SLB

Presenting Author Biography: Haitao Zhang received his PhD in Solid Mechanics in 2005 from the Johns Hopkins University. He joined Schlumberger in 2009 and is currently the FEA Domain Manger in the Modeling and Simulation CPE based at Enabling Technology Development in Sugar Land. His expertise is on solid mechanics and finite element modeling.

Authors:

Haitao Zhang SLB
Muhannad Abuhaikal SLB
Sheng Chang SLB
Viraj Singh SLB
James Wen SLB